/**
 * #      992
 * 名称   K 个不同整数的子数组
 * 链接   https://leetcode-cn.com/problems/subarrays-with-k-different-integers
 * 题解   [247](https://leetcode-cn.com/problems/subarrays-with-k-different-integers/solution)
 * 通过率 45.0%
 * 难道   困难
 */

